MASCARENES ISLANDS/MADAGASCAR: Tropical Cyclone HALIBA (15S, 11) 09/1200Z nr 21.8S 55.2E, moving ESE 8 Kts – Updated 090315 1640z (GMT/UTC)

MODERATE TROPICAL STORM (12) (RSMC La Reunion)

 TROPICAL CYCLONE 15S (HALIBA) (JTWC)

MASCARENES ISLANDS SHOULD STILL MONITOR THE PROGRESS OF THIS SYSTEM

 – (RSMC La Reunion)

si201516_5day 

si201516_sat_anim

ZCZC 549

ZCZC 549
WTIO30 FMEE 091222
RSMC / TROPICAL CYCLONE CENTER / LA REUNION
TROPICAL CYCLONE FORECAST WARNING (SOUTH-WEST INDIAN OCEAN)
0.A WARNING NUMBER: 8/12/20142015
1.A MODERATE TROPICAL STORM 12 (HALIBA)
2.A POSITION 2015/03/09 AT 1200 UTC:
WITHIN 30 NM RADIUS OF POINT 21.8 S / 55.2 E
(TWENTY ONE DECIMAL EIGHT DEGREES SOUTH AND FIFTY FIVE DECIMAL TWO DEGREES EAST)
MOVEMENT : EAST-SOUTH-EAST 8 KT
3.A DVORAK ANALYSIS: 2.5/3.0/W 0.5/12 H
4.A CENTRAL PRESSURE: 993 HPA
5.A MAX AVERAGE WIND SPEED (10 MN): 40 KT
RADIUS OF MAXIMUM WINDS (RMW) :28 KM
6.A EXTENSION OF WIND BY QUADRANTS (KM):
28 KT NE: 80 SE: 80 SW: 80 NW: 100
34 KT NE: 60 SE: 60 SW: 60 NW: 60
7.A FIRST CLOSED ISOBAR (PRESSURE / AVERAGE DIAM): 1007 HPA / 400 KM
8.A VERTICAL EXTENSION OF CYCLONE CIRCULATION : MEDIUM
1.B FORECASTS:
12H: 2015/03/10 00 UTC: 22.6 S / 56.1 E, MAX WIND=040 KT, MODERATE TROPICAL STORM
24H: 2015/03/10 12 UTC: 23.5 S / 57.1 E, MAX WIND=035 KT, MODERATE TROPICAL STORM
36H: 2015/03/11 00 UTC: 23.8 S / 58.0 E, MAX WIND=035 KT, MODERATE TROPICAL STORM
48H: 2015/03/11 12 UTC: 24.0 S / 58.9 E, MAX WIND=035 KT, POST-TROPICAL DEPRESSION
60H: 2015/03/12 00 UTC: 24.7 S / 61.0 E, MAX WIND=035 KT, POST-TROPICAL DEPRESSION
72H: 2015/03/12 12 UTC: 26.6 S / 63.0 E, MAX WIND=030 KT, POST-TROPICAL DEPRESSION
2.B LONGER-RANGE OUTLOOK :
96H: 2015/03/13 12 UTC: 31.4 S / 72.4 E, MAX WIND=035 KT, EXTRATROPICAL SYSTEM
120H: 2015/03/14 12 UTC: 35.1 S / 75.5 E, MAX WIND=040 KT, EXTRATROPICAL SYSTEM
2.C ADDITIONAL INFORMATIONS:
T=2.5+ AND CI=3.0-.
HALIBA HAS SLIGHTLY INTENSIFIED BETWEEN 06Z AND 08Z AND PROBABLY REACHED ITS INTENSITY PEAK (MAX W
INDS AT ABOUT 45KT), TEMPORARILY SHOWING A RAGGED EYE AT 08Z .
AFTER THAT, COULD PATTERN HAD RAPIDLY DETERIORATE AS THE SYSTEM EXPERIENCES A SEVERE IMPACT OF THE
WEST-NORTH-WESTERLY VERTICAL WINDSHEAR.
THE SYSTEM IS EXPECTED TO KEEP ON TRACKING GLOBALLY SOUTH-EASTWARDS WITHIN A WEST TO WESTERLY STEERING FLOW DRIVEN BY THE LOW TO MID-LEVEL NEAR EQUATORIAL HIGHS.
WEDNESDAY, THE SYSTEM SHOULD SLOW DOWN AND EXPERIENCING BY THAT TIME SOME DEEP STRUCTURE CHANGES WITH A LARGER AND MORE ASYMMETRICAL WIND FIELDS SUGGESTING THAT THE SYSTEM MAY LOOSE ITS PURE TROPICAL CHARACTERISTICS.
THURSDAY, THE SYSTEM SHOULD RESUME ITS SOUTHEASTWARDS TRACK WITH AN ONGOING EXTRATROP PROCESS.
GIVEN THE ONGOING AND EXPECTED IMPACT OF THIS SYSTEM OVER PORTIONS OF THE MASCARENES ISLANDS, INHABITANT OF THIS AREA SHOULD STILL MONITOR THE PROGRESS OF THIS SYSTEM.
NNNN

La Reunion

B_q3FKVU0AE3dbt.jpg large

Joint Typhoon Warning Center (JTWC)

https://i2.wp.com/www.usno.navy.mil/NOOC/nmfc-ph/RSS/jtwc/warnings/sh1615.gif

https://i0.wp.com/www.usno.navy.mil/NOOC/nmfc-ph/RSS/jtwc/satshots/16S_090530sams.jpg

 

 

WTXS31 PGTW 090900
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/TROPICAL CYCLONE 16S (HALIBA) WARNING NR 002//
RMKS/
1. TROPICAL CYCLONE 16S (HALIBA) WARNING NR 002
01 ACTIVE TROPICAL CYCLONE IN SOUTHIO
MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
WIND RADII VALID OVER OPEN WATER ONLY

WARNING POSITION:
090600Z — NEAR 21.3S 53.9E
MOVEMENT PAST SIX HOURS – 130 DEGREES AT 06 KTS
POSITION ACCURATE TO WITHIN 025 NM
POSITION BASED ON CENTER LOCATED BY SATELLITE
PRESENT WIND DISTRIBUTION:
MAX SUSTAINED WINDS – 040 KT, GUSTS 050 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 034 KT WINDS – 045 NM NORTHEAST QUADRANT
045 NM SOUTHEAST QUADRANT
040 NM SOUTHWEST QUADRANT
040 NM NORTHWEST QUADRANT
REPEAT POSIT: 21.3S 53.9E

FORECASTS:
12 HRS, VALID AT:
091800Z — 22.2S 55.4E
MAX SUSTAINED WINDS – 045 KT, GUSTS 055 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 034 KT WINDS – 055 NM NORTHEAST QUADRANT
055 NM SOUTHEAST QUADRANT
050 NM SOUTHWEST QUADRANT
050 NM NORTHWEST QUADRANT
VECTOR TO 24 HR POSIT: 130 DEG/ 07 KTS

24 HRS, VALID AT:
100600Z — 23.1S 56.5E
MAX SUSTAINED WINDS – 050 KT, GUSTS 065 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 034 KT WINDS – 070 NM NORTHEAST QUADRANT
070 NM SOUTHEAST QUADRANT
060 NM SOUTHWEST QUADRANT
060 NM NORTHWEST QUADRANT
VECTOR TO 36 HR POSIT: 130 DEG/ 07 KTS

36 HRS, VALID AT:
101800Z — 24.0S 57.6E
MAX SUSTAINED WINDS – 055 KT, GUSTS 070 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 050 KT WINDS – 025 NM NORTHEAST QUADRANT
025 NM SOUTHEAST QUADRANT
025 NM SOUTHWEST QUADRANT
025 NM NORTHWEST QUADRANT
RADIUS OF 034 KT WINDS – 080 NM NORTHEAST QUADRANT
080 NM SOUTHEAST QUADRANT
070 NM SOUTHWEST QUADRANT
070 NM NORTHWEST QUADRANT
VECTOR TO 48 HR POSIT: 130 DEG/ 07 KTS

EXTENDED OUTLOOK:
48 HRS, VALID AT:
110600Z — 24.9S 58.9E
MAX SUSTAINED WINDS – 050 KT, GUSTS 065 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 034 KT WINDS – 080 NM NORTHEAST QUADRANT
080 NM SOUTHEAST QUADRANT
070 NM SOUTHWEST QUADRANT
070 NM NORTHWEST QUADRANT
VECTOR TO 72 HR POSIT: 120 DEG/ 07 KTS

72 HRS, VALID AT:
120600Z — 26.3S 61.4E
MAX SUSTAINED WINDS – 040 KT, GUSTS 050 KT
WIND RADII VALID OVER OPEN WATER ONLY
DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER
RADIUS OF 034 KT WINDS – 070 NM NORTHEAST QUADRANT
070 NM SOUTHEAST QUADRANT
060 NM SOUTHWEST QUADRANT
060 NM NORTHWEST QUADRANT
VECTOR TO 96 HR POSIT: 125 DEG/ 13 KTS

LONG RANGE OUTLOOK:

96 HRS, VALID AT:
130600Z — 29.2S 66.4E
MAX SUSTAINED WINDS – 030 KT, GUSTS 040 KT
WIND RADII VALID OVER OPEN WATER ONLY
DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER

REMARKS:
090900Z POSITION NEAR 21.5S 54.3E.
TROPICAL CYCLONE 16S (HALIBA), LOCATED APPROXIMATELY 85 NM WEST
OF LA REUNION, HAS TRACKED SOUTHEASTWARD AT 06 KNOTS OVER THE PAST
SIX HOURS. ANIMATED MULTISPECTRAL SATELLITE IMAGERY SHOWS A MIDGET
SYSTEM WITH A SLIGHTLY IMPROVED CENTRAL CONVECTION. THE INITIAL
POSITION IS BASED ON THE ABOVE ANIMATION AND ON RECENT MICROWAVE
SATELLITE IMAGES WITH FAIR CONFIDENCE. THE INITIAL INTENSITY IS BASED
ON AN OVERALL ASSESSMENT OF DVORAK ESTIMATES FROM ALL REPORTING
AGENCIES. UPPER-LEVEL ANALYSIS INDICATES TC HALIBA IS LOCATED IN AN
AREA OF MODERATE VERTICAL WIND SHEAR (VWS) OFFSET BY GOOD DUAL
CHANNEL OUTFLOW. TC 16S IS CURRENTLY TRACKING ALONG THE SOUTHEASTERN
PERIPHERY OF A NEAR EQUATORIAL RIDGE TO THE NORTH. THIS RIDGE WILL
REMAIN THE DOMINANT STEERING MECHANISM FOR THE SYSTEM THROUGHOUT THE
FORECAST PERIOD. MARGINALLY FAVORABLE CONDITIONS ARE EXPECTED TO
PERSIST ALLOWING TC 16S TO MODERATELY INTENSIFY OVER THE NEXT 36
HOURS, PEAKING AT 55 KNOTS. AFTERWARDS, THE COMBINED EFFECT OF
INCREASING VWS AND MARGINAL SEA SURFACE TEMPERATURES WILL BEGIN TO
WEAKEN THE SYSTEM, LEADING TO ITS DISSIPATION BY THE END OF THE
FORECAST PERIOD. AVAILABLE MODEL GUIDANCE IS OVERALL IN GOOD
AGREEMENT, LENDING TO HIGH CONFIDENCE IN THE JTWC TRACK FORECAST
WHICH IS POSITIONED CLOSE TO MULTI-MODEL CONSENSUS. MAXIMUM
SIGNIFICANT WAVE HEIGHT AT 090600Z IS 12 FEET. NEXT WARNINGS AT
092100Z AND 100900Z.//
NNNN

MARITIME/ SHIPPING

WTIO22 FMEE 091221
SECURITE
GALE WARNING FOR METAREA VII AND METAREA VIII (S)
ISSUED BY METEO-FRANCE/TROPICAL CYCLONE CENTER/LA REUNION 09/03/2015 AT 1200 UTC.
WARNING NUMBER: 008/12 (SOUTH-WEST INDIAN OCEAN)

10 MINUTES AVERAGE WIND SPEED IN KNOTS (KT)
(WIND GUSTS AT SEA MAY BE ABOUT 40% STRONGER THAN THE AVERAGED WIND)
MINIMUM SEA LEVEL PRESSURE IN HECTOPASCAL (HPA)
(INDICATIVE FIGURE).

GALE WARNING
BEGINNING OF VALIDITY: MONDAY 09/03/2015 AT 1200 UTC.

PHENOMENON: MODERATE TROPICAL STORM 12 (HALIBA) 993 HPA
POSITION: WITHIN 30 NM RADIUS OF POINT 21.8 S / 55.2 E
(TWENTY ONE DECIMAL EIGHT DEGREES SOUTH AND
FIFTY FIVE DECIMAL TWO DEGREES EAST) AT 1200 UTC
MOVEMENT: EAST-SOUTH-EAST 8 KT

THREAT AREAS:
SQUALLY WEATHER EXIST WITHIN A 140 NM RADIUS FROM THE CENTER,
EXTENDING UP TO 200 NM FROM THE CENTER IN THE NORTHEASTERN QUADRANT.

GALE FORCE WINDS 35/40 KT AND VERY ROUGH TO HIGH SEAS WITHIN A 30 NM
RADIUS FROM THE CENTRE, EXTENDING UP TO 35 NM IN THE NORTH-WESTERN
QUADRANT.
NEAR GALE FORCE WINDS 30 KT AND ROUGH TO VERY ROUGH SEAS WITHIN A 45
NM RADIUS FROM THE CENTRE, EXTENDING UP TO 55 NM IN THE NORTH-WESTERN
QUADRANT.
STRONG GUSTS UNDER SQUALLS.

FORECAST POSITION AND INTENSITY:
12H, VALID 2015/03/10 AT 00 UTC:
22.6 S / 56.1 E, MAX WIND = 40 KT, MODERATE TROPICAL STORM
24H, VALID 2015/03/10 AT 12 UTC:
23.5 S / 57.1 E, MAX WIND = 35 KT, MODERATE TROPICAL STORM

OTHER INFORMATIONS:
NIL.=

Further warnings here:

METAREA VII

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